Background: Down's syndrome's association with malignancies such as leukemia is well known, but its association with brain tumor appears to be rare. We reviewed such rare cases of Down's syndrome and intracranial germ-cell tumor.
Case report: A 10-year-old boy with Down's syndrome and intracranial germinoma located in the left basal ganglia is reported. The patient presented with right hemiparesis and was treated with a combination of surgery, chemotherapy with cisplatin and etoposide, and irradiation.
Conclusions: We speculate that the percentage of germ-cell tumors is high among Down syndrome patients with brain tumors and that the most common site is the basal ganglia.